CN217578366U

CN217578366U - Circular mechanical slag and sludge scraping air floatation device

Info

Publication number: CN217578366U
Application number: CN202221583019.XU
Authority: CN
Inventors: 李靖; 董传涛; 黄承军; 王翠玉
Original assignee: Suzhou Bojingyuan Environmental Technology Co ltd
Current assignee: Suzhou Bojingyuan Environmental Technology Co ltd
Priority date: 2022-06-20
Filing date: 2022-06-20
Publication date: 2022-10-14
Anticipated expiration: 2032-06-20

Abstract

The utility model discloses a sediment mud air supporting device is scraped to circular machinery, include: the air flotation device comprises an air flotation device, a water inlet pipe and a steam-water mixing tank, wherein the air flotation device is sequentially provided with a central shaft, a flow guide baffle plate and a slag separating plate from inside to outside; one end of the central shaft is connected with an output shaft of the speed reducing motor, the other end of the central shaft is connected with the sludge settling scraper, and the sludge settling scraper is positioned at the bottom of the air floatation; the top end of the air floatation is provided with a scum scraper, a scum launder, a scum collecting tank and a clear water tank; the scum scraper is fixedly connected with the central shaft; one end of the scum chute, which is close to the central shaft, is closed, the other end of the scum chute is opened and connected with a scum collecting tank, and a slag discharging pipe is arranged on the scum collecting tank; a water outlet pipe is arranged on the clear water tank; the bottom end of the air floatation is provided with a sludge settling and discharging pipe; the steam-water mixing tank is provided with a compressed air inlet pipe, a front dissolved air water inlet pipe and a dissolved air water inlet pipe; the water inlet pipe and the water outlet of the water inlet pipe are positioned between the central shaft and the flow guide baffle, and the water outlet of the water inlet pipe is positioned below the water outlet of the water inlet pipe, so that the structure is simple.

Description

Circular mechanical slag and sludge scraping air floatation device

Technical Field

The utility model relates to the technical field of wastewater treatment, in particular to slag mud air supporting device is scraped to circular machinery.

Background

In the field of sewage treatment, the air flotation technology is a common process, and air flotation is carried out by dissolving excess air into water under high pressure to form supersaturated gas-dissolved water, then releasing the supersaturated gas-dissolved water under air flotation internal normal pressure and mixing the supersaturated gas-dissolved water with sewage to be treated; excessive air in the supersaturated dissolved air water is released and forms a large amount of micro bubbles, the micro bubbles are contacted with suspended matters in the raw water and adhered to the suspended matters, so that the suspended matters float upwards and are carried to the water surface for skimming, and the water quality purification is realized.

However, suspended matters in the sewage cannot be completely adhered with micro bubbles, or part of the suspended matters are adhered with bubbles with large specific gravity and cannot float upwards, so that the suspended matters cannot float upwards completely, part of the suspended matters sink, and a large amount of sludge is accumulated at the bottom of the air floatation in days, thereby reducing the treatment effect of the air floatation; in order to ensure the efficient use of the air flotation, the air flotation is required to be stopped periodically to clear the mud at the bottom of the air flotation, so that the sewage treatment process is discontinuous.

In the conventional air flotation, scum on the surface of the air flotation is skimmed by a scum scraper driven by a gear set and horizontally moved, so that mechanical removal of settled sludge at the bottom of the air flotation cannot be realized, and equipment needs to be cleaned regularly. The sludge bucket is also arranged to remove settled sludge by virtue of natural downward sliding of the sludge, and in order to ensure continuous natural downward sliding of the sludge, the inclination of the sludge bucket is large, the air floatation equipment needs to be high, and the air floatation equipment is high in cost. If the sludge bucket has a small inclination, the sludge cannot slide down to the bottom of the sludge bucket in time, the concentration of the discharged sludge is low, the sludge discharge amount by air floatation is large, and the air floatation load is large.

The publication number is: the Chinese patent document CN 102452695A provides a radial flow type micro-nano air floatation device, and proposes that scum scraping and sludge scraping are connected up and down to realize simultaneous collection of scum and sludge, but a dissolved air water inlet pipe of the device is deep from the upper part and the lower part of a horizontal shaft of a sludge scraper to the bottom of a tank, the sludge scraper cannot operate in the operation process, and the technology cannot operate.

The publication number is: CN 102079553B provides a shallow air floating machine for industrial wastewater treatment and treatment process thereof, and provides a shallow air floating machine composed of a slag discharging cylinder, a weir plate, a rotary central cylinder, a water distribution clapboard, a rotary water inlet main pipe, a rotary water inlet branch pipe, a rotary skimming device and an air floating machine cylinder, but the invention does not consider the problem of sludge cleaning at the bottom, and most of the components need to rotate.

Therefore, the air flotation device can simultaneously remove the scum on the surface of the equipment and the settled sludge at the bottom, and simultaneously has the advantages of few rotating devices, simple and convenient device and convenient maintenance, which is an important technical problem to be solved by technical personnel in the field at present.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a sediment mud air supporting device is scraped to circular machinery to solve among the prior art air supporting and can not get rid of the technical problem that the superficial dross is heavy mud and the maintenance degree of difficulty is big simultaneously with the bottom.

In order to achieve the above object, the utility model provides a sediment mud air supporting device is scraped to circular machinery, include: the air flotation device comprises an air flotation device, a water inlet pipe and a steam-water mixing tank, wherein the air flotation device is sequentially provided with a central shaft, a flow guide baffle plate and a slag separation plate from inside to outside; one end of the central shaft is connected with an output shaft of the speed reducing motor, the other end of the central shaft is connected with a sludge settling scraper, and the sludge settling scraper is positioned at the bottom of the air floatation; the top end of the air floatation body is provided with a scum scraper, a scum launder, a scum collecting tank and a clear water tank; the scum scraper is fixedly connected with the central shaft; one end of the scum launder, which is close to the central shaft, is closed, the other end of the scum launder is opened and connected with the scum collecting tank, and the scum collecting tank is provided with a slag outlet pipe; a water outlet pipe is arranged on the clean water tank; a sludge settling and discharging pipe is arranged at the bottom end of the air floatation; the steam-water mixing tank is provided with a compressed air inlet pipe, a front dissolved air water inlet pipe and a dissolved air water inlet pipe; the water inlet pipe of the dissolved air water and the water outlet of the water inlet pipe are positioned between the central shaft and the diversion baffle, and the water outlet of the dissolved air water inlet pipe is positioned below the water outlet of the water inlet pipe.

Further, the gradient of the bottom of the air floatation body towards the center is not less than 0.3%.

Furthermore, the lower edge of the scum scraper is not less than 5mm lower than the water surface, and the upper edge of the scum scraper is not less than 1mm higher than the water surface.

Further, the dross scraper is made of a flexible material.

Further, the central shaft rotational speed is less than 30rad/min.

Further, the air flotation outer wall and the flow guide baffle are respectively connected with the dissolved air water inlet pipe and the water inlet pipe.

Further, dross launder roof is higher than the clear water groove upper edge is no less than 2mm, the tank bottom of dross launder is higher than the clear water groove upper edge is no less than 1mm, dross launder opening horizontal width is greater than 1cm.

Further, the pressure of the steam-water mixing tank is controlled to be 0.3-0.5 Mpa.

Furthermore, the slag separating plate is not less than 5mm higher than the water surface.

Furthermore, a speed reduction motor support is arranged between the air floatation device and the speed reduction motor, and the speed reduction motor is positioned on the speed reduction motor support.

Compared with the prior art, the utility model discloses following beneficial effect has been produced: the utility model discloses a circular mechanical scum scraping mud air supporting device, should make the device can incessantly high-efficiently collect the air supporting scum that floats on the surface of water and sink the mud that can't come up in the air supporting bottom and discharge through setting up mud-depositing scraper blade, dross chute and dross collecting vat in the course of operating, the equipment can operate continuously and need not to shut down clear mud; meanwhile, the scum collecting equipment is fixed in position and does not need to rotate, so that the scum collecting equipment is simple in structure, low in failure rate and convenient to maintain.

Drawings

Fig. 1 is a schematic sectional structure of the present invention;

FIG. 2 is a schematic plan view of the present invention;

description of reference numerals: 1-air flotation, 2-water inlet pipe, 3-steam-water mixing tank, 4-central shaft, 5-flow guide baffle, 6-slag separation plate, 7-speed reduction motor, 8-sludge settling scraper, 9-scum scraper, 10-scum launder, 11-scum collecting tank, 12-clear water tank, 13-slag discharge pipe, 14-water outlet pipe, 15-sludge settling sludge discharge pipe, 16-compressed air inlet pipe, 17-front dissolved air inlet pipe, 18-dissolved air inlet pipe and 19-speed reduction motor support.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1 and 2, a preferred embodiment of the present invention provides a circular mechanical slag-mud scraping air-floating device, which includes: the device comprises an air flotation 1, a water inlet pipe 2 and a steam-water mixing tank 3, wherein the air flotation 1 is sequentially provided with a central shaft 4, a flow guide baffle 5 and a slag separating plate 6 from inside to outside; one end of the central shaft 4 is connected with an output shaft of a speed reducing motor 7, the other end of the central shaft 4 is connected with a sludge settling scraper 8, and the sludge settling scraper 8 is positioned at the bottom of the air flotation 1; a scum scraper 9, a scum launder 10, a scum collecting tank 11 and a clear water tank 12 are arranged at the top of the air flotation 1; the scum scraper 9 is fixedly connected with the central shaft 4; one end of the scum launder 10 close to the central shaft 4 is closed, the other end opening of the scum launder 10 is connected with the scum collecting tank 11, and a slag outlet pipe 13 is arranged on the scum collecting tank 11; a water outlet pipe 14 is arranged on the clean water tank 12; a sludge settling and discharging pipe 15 is arranged at the bottom end of the air floatation 1; the steam-water mixing tank 3 is provided with a compressed air inlet pipe 16, a front dissolved air inlet pipe 17 and a dissolved air water inlet pipe 18; the water inlet pipe 18 for the gas-dissolving water and the water outlet of the water inlet pipe 2 are positioned between the central shaft 4 and the diversion baffle 5, and the water outlet of the water inlet pipe 18 for the gas-dissolving water is positioned below the water outlet of the water inlet pipe 2. Compressed air and low turbidity clear water are pressurized and enter a steam-water mixing tank 3 to be mixed to generate supersaturated gas-dissolved water, the supersaturated gas-dissolved water enters the lower part of a flow guide baffle 5 of an air floatation 1 through a fixed gas-dissolved water inlet pipe 18, the pipe orifice of the gas-dissolved water inlet pipe 18 is positioned below the water outlet of a fixed water inlet pipe 2, the saturated gas-dissolved water releases redundant air to form a large amount of micro bubbles, the micro bubbles are contacted with and adhered to suspended matters in sewage flowing out of the water inlet pipe 2, the suspended matters float upwards and are brought to the water surface to form a scum layer, and the micro bubbles cannot be adsorbed or the suspended matters with larger specific gravity naturally settle in the air floatation to form a sludge layer.

The speed reducing motor 7 drives the central shaft 4 positioned on the axis of the cylinder body of the air flotation 1 to rotate, and the central shaft 4 is connected with the scum scraper 9 and the sludge settling scraper 8 to rotate; when the scum scraper blade 9 rotates, scum is scraped into a scum launder 10, then the scum slides along the scum launder 10 to a scum collecting tank 11 at the outer edge of the air floatation, and finally the scum is discharged through a slag discharge pipe 13; when the sludge-settling scraper 8 rotates, the settled sludge is firstly scraped to the center of the air flotation 1 and is discharged through the sludge-settling and discharging pipe 15.

Sewage enters air floatation at the lower part of the flow guide baffle plate 5, flows upwards in the flow guide baffle plate 5, adsorbs micro bubbles and then flows to the periphery in a radiation manner, solid-liquid separation is further completed in a space formed by the flow guide baffle plate 5 and the slag separating plate 6, and clear water flows from the lower edge of the slag separating plate 6 to the upper edge of the clear water tank 12, falls into the clear water tank 12 and flows out from the water outlet pipe 14; the flocculation of the sewage can be completed in the water inlet pipe; the flocculation of the sewage can also be finished in the guide baffle 5 of the air floatation; the low-turbidity clear water added into the steam-water mixing tank 3 can adopt air-floatation effluent water of an air-floatation clear water tank 7.

Preferably, the gradient from the bottom of the air flotation 1 to the center is not less than 0.3%, and the bottom of the air flotation 1 has a certain gradient to the center so that settled sludge can slide to the center of the air flotation when the scraper rotates.

Preferably, the lower edge of the scum scraper 9 is not less than 5mm lower than the water surface, and the upper edge of the scum scraper 9 is not less than 1mm higher than the water surface, so that scum is scraped into the scum launder 10 first when the scum scraper 9 rotates, and the scum scraper 9 is made of PP or PVC flexible material.

Preferably, the rotation speed of the central shaft 4 is less than 30rad/min.

Preferably, the outer wall of the air floatation 1 and the diversion baffle 5 are respectively connected with the dissolved air water inlet pipe 18 and the water inlet pipe 2, so that the dissolved air water inlet pipe 18 and the water inlet pipe 2 are fixed in position in the air floatation operation process.

Preferably, the top of dross launder 10 groove is higher than 2mm are no less than along the clear water groove 12, the tank bottom of dross launder 10 groove is higher than the clear water groove 12 is last along being no less than 1mm, dross launder 10 opening horizontal width is greater than 1cm, dross launder 10 sets up one at least and prevents that the dross from getting into clear water groove 12.

Preferably, the pressure of the steam-water mixing tank 3 is controlled to be 0.3-0.5 Mpa.

Preferably, the slag separation plate 6 is not less than 5mm higher than the water surface, so that a scum layer formed on the water surface is prevented from entering a clean water area.

Preferably, a speed reduction motor support 19 is arranged between the air flotation 1 and the speed reduction motor 7, the speed reduction motor 7 is located on the speed reduction motor support 19, and the speed reduction motor support 19 is used for supporting the speed reduction motor 7.

Example (b):

the circular mechanical residue mud scraping air flotation and the method for treating sewage by some printing and dyeing enterprises from the North China Schchen platform have the advantages of sewage COD (chemical oxygen demand) 1500mg/L, SS (suspended solid) 400mg/L, chroma 800 and treatment capacity 300m ³ and/D. A circular mechanical scum has an air-float diameter of 3000mm and a height of 1500mm. The height of the guide baffle 5 is 800mm, the diameter is 950mm, and the distance between the upper edge of the guide baffle 5 and the air-bearing water surface is 200mm. The width of the clear water tank 12 is 200mm, the depth is 200mm, and the distance between the tank top and the air floating roof is 200mm. The width of the scum collecting tank 11 is 200mm, the depth of the scum collecting tank is 200mm, a water outlet pipe 14 is arranged, and the height of the scum collecting tank 11 is the same as that of the clear water tank 12; the pipe diameter DN150 of the scum launder 10 is 40mm, and the horizontal width of the opening of the scum scraper 9 is 40mm at the position which is 50mm higher than the water surface in the opposite direction; the height of the slag separation plate 6 is 600mm, the diameter of the water outlet pipe is 3000mm, the pipe diameter of the water outlet pipe is 14 DN80, and the pipe diameter of the slag outlet pipe is 13 DN100.

Air is pressurized to 0.5Mpa by an air compressor, tap water is pumped into a steam-water mixing tank 3 by a pump pressure pump with a lift of 60 meters to be mixed to generate supersaturated gas-dissolved water, the pressure of the steam-water mixing tank 3 is controlled to be 0.3-0.5 Mpa, the supersaturated gas-dissolved water generated by the steam-water mixing tank 3 enters the position 600mm below a diversion baffle 5 of the air flotation 1 through a gas-dissolved water inlet pipe 18 of DN40,

a speed reduction motor 7 rotates at 1rad/m to drive a central shaft 4 positioned on the axis of a cylinder body of the air flotation 1 to rotate, and the central shaft 4 is connected with a scum scraper 9 and a mud sedimentation scraper 8 to rotate; when the scum scraper 9 rotates, scum is scraped into the scum launder 10, and then the scum slides to a scum collecting tank 11 at the outer edge of the air floatation 1 along the scum launder 10 and is discharged through a slag discharge pipe 13. When the sludge-settling scraper 8 rotates, the settled sludge is firstly scraped to the center of the air flotation 1 and is discharged through the sludge-settling and discharging pipe 15.

The air flotation of air flotation effluent COD700mg/L, SS20mg/L and chroma 100 are treated by the circular mechanical residue mud scraping air flotation and the method; the COD removal rate is 50%, the SS removal rate is 95%, the chroma removal rate is 80%, and the equipment is not stopped for one year to clear bottom sediments.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: the device can uninterruptedly and efficiently collect and discharge scum and sludge in the running process of equipment, and the equipment can continuously run without stopping the machine for cleaning the sludge; the device's water intaking, dissolved air water and collection dross equipment rigidity need not to rotate, and simple structure fault rate is low, easy maintenance.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.

Claims

1. The utility model provides a sediment mud air supporting device is scraped to circular machinery which characterized in that includes: the air flotation device comprises an air flotation (1), a water inlet pipe (2) and a steam-water mixing tank (3), wherein the air flotation (1) is sequentially provided with a central shaft (4), a flow guide baffle (5) and a slag separation plate (6) from inside to outside; one end of the central shaft (4) is connected with an output shaft of a speed reducing motor (7), the other end of the central shaft (4) is connected with a sludge settling scraper (8), and the sludge settling scraper (8) is positioned at the bottom of the air flotation (1); a scum scraper (9), a scum launder (10), a scum collecting tank (11) and a clear water tank (12) are arranged on the top of the air float (1); the scum scraper (9) is fixedly connected with the central shaft (4); one end of the scum launder (10) close to the central shaft (4) is closed, the other end of the scum launder (10) is opened and connected with the scum collecting tank (11), and a slag discharging pipe (13) is arranged on the scum collecting tank (11); a water outlet pipe (14) is arranged on the clean water tank (12); a sludge settling and discharging pipe (15) is arranged at the bottom end of the air floatation (1); the steam-water mixing tank (3) is provided with a compressed air inlet pipe (16), a front dissolved air inlet pipe (17) and a dissolved air water inlet pipe (18); the water inlet pipe (18) for the dissolved air water and the water outlet of the water inlet pipe (2) are located between the central shaft (4) and the diversion baffle plates (5), and the water outlet of the water inlet pipe (18) for the dissolved air water is located below the water outlet of the water inlet pipe (2).

2. The circular mechanical slag mud scraping air flotation device according to claim 1, characterized in that: the gradient of the bottom of the air flotation (1) to the center is not less than 0.3 percent.

3. The circular mechanical slag mud scraping air flotation device according to claim 1, characterized in that: the lower edge of the scum scraper (9) is not less than 5mm lower than the water surface, and the upper edge of the scum scraper (9) is not less than 1mm higher than the water surface.

4. The circular mechanical slag mud scraping air flotation device according to claim 3, characterized in that: the scum scraper (9) is made of flexible material.

5. The circular mechanical slag mud scraping air flotation device according to claim 1, characterized in that: the rotating speed of the central shaft (4) is less than 30rad/min.

6. The circular mechanical slag mud scraping air flotation device according to claim 1, characterized in that: the outer wall of the air flotation (1) and the diversion baffle (5) are respectively connected with the dissolved air water inlet pipe (18) and the water inlet pipe (2).

7. The circular mechanical slag mud scraping air flotation device according to claim 1, characterized in that: dross chute (10) groove top is higher than the clear water groove (12) are gone up along being no less than 2mm, the tank bottom in dross chute (10) groove is higher than clear water groove (12) are gone up along being no less than 1mm, dross chute (10) opening horizontal width is greater than 1cm.

8. The circular mechanical slag mud scraping air flotation device according to claim 1, characterized in that: the pressure of the steam-water mixing tank (3) is controlled to be 0.3-0.5 Mpa.

9. The circular mechanical slag mud scraping air flotation device according to claim 1, characterized in that: the slag separation plate (6) is not less than 5mm higher than the water surface.

10. The circular mechanical slag and mud scraping air flotation device as claimed in claim 1, wherein: a speed reducing motor support (19) is arranged between the air flotation (1) and the speed reducing motor (7), and the speed reducing motor (7) is located on the speed reducing motor support (19).